| Course Unit Code | 338-0534/02 |
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| Number of ECTS Credits Allocated | 5 ECTS credits |
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| Type of Course Unit * | Compulsory |
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| Level of Course Unit * | Second Cycle |
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| Year of Study * | First Year |
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| Semester when the Course Unit is delivered | Summer Semester |
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| Mode of Delivery | Face-to-face |
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| Language of Instruction | Czech |
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| Prerequisites and Co-Requisites | Course succeeds to compulsory courses of previous semester |
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| Name of Lecturer(s) | Personal ID | Name |
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| PAV70 | doc. Ing. Bohuslav Pavlok, CSc. |
| BOV69 | Dr. Ing. Miroslav Bova |
| Summary |
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| In the course Hydraulics of Working and Production Machinesthe students will get acquainted with hydraulic systems of mobile working machines and with selected special problems of hydraulic systems of production machines. These include, for example, mobile machinery chassis drives, mobile machinery hydrostatic transmissions, mobile working machine superstructure drives, energy-saving hydrostatic systems, accumulator systems, emulsion and water hydraulics, etc. |
| Learning Outcomes of the Course Unit |
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| Students in the course apply knowledge of the subject Hydraulic elements and systems and applies them to the hydraulic systems of working and production machines. Students will learn the function of selected working and production machines and will be able to design a hydraulic drive or transmission. They can analyze the characteristics and behavior of the machine and drive and design or modify its control according to the requirements of the assignment. They will get acquainted with specific problems of individual machines and their drives, such as mobile machinery chassis drives, hydrostatic transmissions of mobile machines, drives of mobile working machines superstructure, energy-saving hydrostatic systems, accumulator systems, emulsion and water hydraulics etc. |
| Course Contents |
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1. Application of hydrostatic drives and transmissions in mobile working machines. Specific requirements for hydraulic mobile machines (excavators, loaders, dozers, road machinery, building machines), etc.
2. Driving mechanisms of mobile machines. Composition of drive. Internal combustion engine: design, control, characteristics.
3. Torque characteristics of drives and working mechanisms. Operating point of drive. Starting of the drive.
4. Hydrostatic transmission. Control of the hydrostatic transmission. Characteristics of the hydrostatic transmission. Problems of filtration and cooling.
5. Multi-motor drives of mobile machines. Implementation of differential functions with parallel motors. Control of driving direction. Mechanic and electro-hydraulic power steering.
6. Hydrostatic drive of upper construction of mobile machinery. Proportional valves for mobile equipment.
Compensation of load with pressure weights.
7. Energy saving of drives. Load-sensing systems with open center and closed center.
8. Hydraulic presses. Cordless actuators. Applications in presses.
9. Electro-hydraulic actuators of robots and manipulators. Speed and positional servodrives in robots, manipulators, machine tools, aircraft, military equipment.
10. Synchronous operation of two or more motors. Application: water works, stage equipment, lifting equipment.
11. Hydraulics in the mines. Specific requirements for emulsion and water hydraulics.
12. Hydraulics in steelworks. Electro-hydraulic automatic gauge control on rolling mills.
13. Hydraulics in cars: hydraulic brake, hydraulic transmissions, hydraulic shock absorbers, anti-slip ABS systems.
14. Hydraulic equipment operating in potentially explosive atmospheres. Intrinsically safe controls and drives.
Syllabus of practicals:
1. Repeat: Graphical symbols for hydraulic components. Basic hydraulic circuits.
2. Properties of hydraulic circuits working fluids: viscosity,
compressibility. Design a working fluid or working the machine.
3. Design and calculation of the hydraulic circuit with consideration of pressure losses and
efficiency.
4. Torque characteristics of actuators, mechanisms, choice of working point.
5. Design and calculation of the hydrostatic transmission.
6. Multi motor drives. Synchronous operation of two or more motors.
7. Program No. 1: Design of driving mechanisms of mobile machines.
8. Program No. 2: Design of hydrostatic drive of upper construction of mobile machinery.
9. Energy-efficient regulatory system with LS oil delivering. Design,
calculation.
10. Energy-efficient regulatory system with LS system
oil delivering.
11. Task No. 3: Hydrostatic drive with accumulators.
12. Circuit design with built-in valves.
13. The dynamics of hydraulic drive system - the machine.
14. Position servo control for rolling mill quarto. Credit.
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| Recommended or Required Reading |
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| Required Reading: |
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GÖTZ, W. Hydraulics. Theory and Application. Ditzingen: Rexroth Bosch Group + OMEGON, 1998. 291 s. ISBN 0-7680-0242-7.
FINDEISEN, D. Őlhydraulik. Berlin – Heidelberg: Springer Verlag, 1996. ISBN 13 978-3-23880-5. |
PAVLOK, B. Hydraulické prvky a systémy. Díl 1. Ostrava: VŠB-TU Ostrava, 2013. 156 s. ISBN 978-80-248-2983-8.
PAVLOK, B. Hydraulické prvky a systémy. Díl 2. Ostrava: VŠB-TU Ostrava, 2008. 150 s. ISBN 978-80-248-1827-6.
VANĚK, A. Moderní strojní technika a technologie zemních prací. Praha: ACADEMIA, 2003. 526 s. ISBN 80-200-1045-9.
KOPÁČEK, J., PAVLOK, B. Tekutinové mechanismy. Ostrava: VŠB-TU Ostrava, 1994. 156 s. ISBN 80-7078-238-2.
KOPÁČEK, J. Hydrostatické převodové mechanizmy. Praha: SNTL Praha, 1986. 272 s.
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| Recommended Reading: |
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NOACK, S. Hydraulics in Mobile Equipment. Ditzingen: Rexroth Bosch Group + OMEGON, 2001. 202 s. ISBN 0-7680-0886-7.
LIFT, H., HANSEL, M. Hydrauliksysteme in der Bau- und Kommunaltechnik. Würzburg: Vogel Verlag, 1991. 345 s. ISBN 3-8023-0445-4. |
PIVOŇKA J. a kol. Tekutinové mechanismy. Praha: SNTL, 1987. 623 s.
KUČÍK, P., STRÁŽOVEC, I., KRIŠŠÁK, P. Hydraulický prenos energie. Žilina: ŽU v Žiline, 2000. 384 s. ISBN 80-7100-725-0.
HLAVŇA, V., KUKUČA, P. a kol. Dopravný prostriedok - Jeho motor. Žilina: ŽU v Žilině, 2000, 442 s. ISBN 80-7100-665-3.
NOACK, S. Hydraulics in Mobile Equipment. Ditzingen: Rexroth Bosch Group + OMEGON, 2001. 202 s. ISBN 0-7680-0886-7.
EXNER, H. et al. Hydraulics, Basic Principles and Components. Würzburg, Germany: Bosch Rexroth AG., 2011. 326 p. ISBN 978-3-9814879-3-0.
MURRENHOFF, H., ECKSTEIN, L. Fluidtechnik für mobile Anwendungen. Shaker Verlag GmbH, Germany, 2014. 347 p. ISBN 978-3844029192.
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| Planned learning activities and teaching methods |
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| Lectures, Tutorials, Project work |
| Assesment methods and criteria |
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| Task Title | Task Type | Maximum Number of Points
(Act. for Subtasks) | Minimum Number of Points for Task Passing |
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| Graded exercises evaluation | Graded credit | 100 | 51 |